Keychain knife



FIG. 1 is a perspective view of a keychain knife in accordance with our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a left side elevational view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines showing further details of the keychain knife are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a keychain knife, as shown. 